*{margin: 0;padding: 0;}
div{margin: 0 auto;width: 620px;}
span{display:block;float:left;}
.msg{width: 521px;height:38px;border:1px solid red;box-sizing: border-box;padding: 7px 5px;}
input{outline: none;border:none;width: 100%;}
.btn{height: 38px;border:1px solid orange;background-color: orange;width: 80px;box-sizing: border-box;}
button{border:none;background: none;width: 100%;height: 100%;text-align: center;line-height: 38px;font-size: 18px;}
ul{clear: left;list-style: none;width: 521px;}

